JP2015523931A - Ship propulsion device and ship equipped with the same - Google Patents

Abstract

The present invention discloses a marine vessel propulsion device and a marine vessel equipped with the same. A marine propulsion device according to an embodiment of the present invention includes a rear propeller fixed to a rotation shaft, a front propeller rotatably supported by a rotation shaft in front of the rear propeller, a hub of the front propeller, and the rotation shaft. And one or more bearings interposed between the rotating shaft and the hull, and the rotation of the rotating shaft is reversed and transmitted to the front propeller, and a plurality of the reverse rotation of the front propeller is realized. A reversing rotating device including a gear box housed in an installation space formed at the rear of the hull with a built-in gear, and the rotating shaft is used for monitoring one or more operating states in the bearing Install one or more measurement units.

Description

  The present invention relates to a marine vessel propulsion device that generates propulsive force while two propellers rotate in opposition to each other, and a vessel equipped with the same.

  A typical marine propulsion device includes one helical propeller. However, since the propulsion device including one propeller cannot use the rotational energy of the water flow generated by the rotation of the propeller as a propulsive force, the energy loss is large.

  A counter-rotating propeller (CRP) is a device that can recover the rotational energy lost in this way as a propulsive force. The contra-rotating propulsion device generates a propulsive force while two propellers installed on the same axis rotate in the opposite directions. The rear propeller of the contra-rotating propulsion device rotates in a direction opposite to the rotation direction of the front propeller, and can recover the rotational energy of the fluid generated by the front propeller as a propulsive force. Therefore, the contra-rotating propulsion device can exhibit higher propulsion performance than the propulsion device including one propeller.

  However, the contra-rotating propulsion unit is relatively difficult to manufacture and install because it includes a reversing rotating device that realizes the opposite rotation of two propellers and a hollow shaft, etc., and is stable while maintaining reliability. A high technical level is required for operation.

  U.S. Published Patent No. 2011/0033296 (2011.02.10. Published) and JP-A 62-279189 (1987.12.04. Published) provide examples of the counter-rotating propulsion device described above. U.S. Published Patent No. 2011/0033296 discloses a planetary gear type reversal rotation device installed in the hull and a counter rotating propulsion device having a hollow shaft, and Japanese Patent Laid-Open No. Sho 62-279189. A contra-rotating rotating device in which a planetary gear type rotating rotating device is installed on the stern side is disclosed.

  Accordingly, the present invention has been proposed to solve the conventional problems as described above, and an object of the present invention is to realize a stable reciprocal inversion of two propellers by simplifying the power transmission system from the conventional one. Another object of the present invention is to provide a marine vessel propulsion device that is easy to manufacture, install and maintain, and a marine vessel equipped with the same.

  Another object of the present invention is to provide a marine vessel propulsion device for producing electrical energy by the reciprocal rotation of a coil and a magnetic body, which are installed so as to face each other between a hub and a rotating shaft of a front propeller, and the same. Is to provide a good ship.

  According to one aspect of the present invention for achieving the above object, a rear propeller fixed to a rotating shaft, a front propeller rotatably supported by the rotating shaft in front of the rear propeller, and a hub of the front propeller One or more bearings interposed between the rotating shaft and the hull between the rotating shaft and the hull, and the rotation of the rotating shaft is reversed and transmitted to the front propeller, A reversing rotation device including a gear box housed in an installation space formed at the rear of the hull with a plurality of gears embodying reversal of the front propeller built therein, the rotation shaft being included in the bearing It is possible to provide a marine vessel propulsion device equipped with one or more measurement units for monitoring one or more operating states.

  The measurement unit may include a sensor that measures a temperature change of the bearing and an adapter that incorporates the sensor.

  The adapter may be formed of a metal material having thermal conductivity, and may be formed in a bell mouth shape and attached to a coupling groove provided on the rotating shaft, or may be provided integrally with the rotating shaft. .

  A connection cable connected to the sensor to transmit a temperature change measurement value of the bearing to the outside may be further included.

  A communication unit that receives the temperature change measurement value of the bearing from the sensor; and a determination unit that determines whether the operation of the bearing is maintained in a normal state based on the received temperature change measurement value of the bearing; And a display unit that displays one or more of the measured temperature change value of the bearing and the determined result value on a screen.

  The bearings include first and second thrust bearings that support a thrust load acting on the rotating shaft from the front propeller, a first radial bearing that supports a radial load acting on the rotating shaft from the front propeller, and A second radial bearing installed between the rotating shaft and the hull and supporting the rotating shaft in front of the gear box; and an axial force transmitted from the front propeller and the rear propeller to the rotating shaft. One or more of the third and fourth thrust bearings that transmit the pressure to the hull side may be included.

  It includes a coil and a magnetic body that are installed to face each other between the hub of the front propeller and the rotating shaft, and produces electric energy by the opposite rotation of the coil and the magnetic body when the rotating shaft rotates. The electric energy may be supplied as an energy source of the measurement unit.

  The magnetic body may include at least one of a permanent magnet and an electromagnet.

  It further includes a cylindrical first outer support ring and a first inner support ring provided between the hub of the front propeller and the rotating shaft, and the first outer support ring includes an outer ring of the second thrust bearing. The first inner support ring is interposed between the inner ring of the second radial bearing and the inner ring of the first radial bearing. The first inner support ring is interposed between the outer ring of the first radial bearing and the inner ring of the first radial bearing. These can be mutually supported.

  The plurality of gears include a drive bevel gear connected to the rotary shaft so as to rotate together, a driven bevel gear rotatably supported around the rotary shaft and connected to the hub of the front propeller, and the drive bevel gear And one or more reversing bevel gears for reversing the rotation of the rotation and transmitting the rotation to the driven bevel gear.

  A connecting member rotatably supported on the outer side of the rotating shaft and connecting the driven bevel gear and the hub of the front propeller, and a rear inner bearing installed between the inner surface of the connecting member and the rotating shaft; Further can be included.

  A cylindrical second inner support ring and a second outer support ring that are provided between the connecting member and the outer surface of the rotating shaft and support the rear inner bearing, and the second inner support ring includes: The inner ring of the rear inner bearing and the inner ring of the first thrust bearing are interposed between the inner ring and the second outer support ring so as to support the outer ring of the rear inner bearing. It can be installed on the inner surface side of the connecting member.

  The coil is wound along an outer peripheral surface and an inner peripheral surface of the first inner support ring, and the magnetic body is installed inside the first outer support ring so as to face the coil. Can do.

  The coil is wound along an outer peripheral surface and an inner peripheral surface of the second inner support ring, and the magnetic body is installed inside the second outer support ring so as to face the coil. Can do.

  According to the other aspect of this invention, the ship provided with the above-mentioned propulsion apparatus can be provided.

  The propulsion device according to the embodiment of the present invention is mounted in such a manner that the gear box of the reverse rotation device enters the installation space formed at the rear of the hull in a state where the reverse rotation device is manufactured and assembled outside the hull. Thus, the manufacture and installation can be performed easily.

  In addition, it is possible to use the electrical energy produced by the reciprocal rotation of the coil and the magnetic material installed so as to face each other between the hub of the front propeller and the rotating shaft as an energy source of various facilities in the ship. it can.

  In addition, a measuring unit for monitoring the operating state of one or more bearings interposed between the hub and the rotating shaft of the front propeller and between the rotating shaft and the hull is attached to the rotating shaft. Depending on the monitoring results, quick action can be taken.

  In addition, by using the electrical energy produced by the reciprocal rotation of the coil and the magnetic material installed so as to face each other between the hub and the rotating shaft of the front propeller as the energy source of the measurement unit, the front propeller is used. It is possible to continuously monitor the operating condition of one or more bearings interposed between the hub and the rotary shaft and between the rotary shaft and the hull.

It is sectional drawing which showed the state by which the propulsion apparatus which concerns on the Example of this invention was applied to the ship. It is sectional drawing of the propulsion apparatus which concerns on the Example of this invention. It is a disassembled perspective view of the propulsion apparatus which concerns on the Example of this invention. It is a disassembled perspective view of the inversion rotation apparatus of the propulsion apparatus which concerns on the Example of this invention. It is a detailed sectional view showing a mounting structure of a bearing that supports the front propeller of the propulsion device according to the embodiment of the present invention. The state where the 1st radial bearing was separated is shown as a detailed sectional view showing the mounting structure of the bearing which supports the front propeller of the propulsion device concerning the example of the present invention. The state which the reverse rotation apparatus was isolate | separated is shown as sectional drawing which showed the example of mounting | wearing of the reverse rotation apparatus of the propulsion apparatus which concerns on the Example of this invention. It is sectional drawing which showed the state with which the reverse rotation apparatus of the propulsion apparatus which concerns on the Example of this invention was mounted | worn in the installation space of the tail of a hull. It is sectional drawing which showed the 1st sealing device of the propulsion apparatus which concerns on the Example of this invention. It is the disassembled perspective view which showed the 1st sealing device of the propulsion apparatus which concerns on the Example of this invention. It is sectional drawing which showed the 2nd sealing device of the propulsion apparatus which concerns on the Example of this invention. It is the figure which showed the propulsion apparatus with which the electric power generating apparatus which concerns on the Example of this invention was comprised. It is the figure which showed the example utilized for the measurement unit for monitoring the operation state of each bearing for the electrical energy produced by the electric power generating apparatus of FIG. It is a disassembled perspective view of the measurement unit of FIG. It is the block diagram which showed the monitoring apparatus which performs monitoring of a bearing operation state based on the information measured by the measurement unit supplied with the electrical energy produced by the electric power generating apparatus of FIG. 12 as an energy source.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  As shown in FIGS. 1 and 2, the marine vessel propulsion device according to the embodiment of the present invention includes a front propeller 10 and a rear propeller 20 that are arranged so that their axes coincide with the rear of the hull 1. In order to implement the contradictory rotation of the front propeller 10 and the rear propeller 20, a reverse rotation device 30 installed at the rear 3 of the hull 1 is provided. That is, it is a counter-rotating propulsion device that generates propulsive force while the two propellers 10 and 20 rotate in the opposite directions.

  Here, the rear boss 3 of the hull 1 is a stern boss as a portion protruding in a streamline from the hull 1 toward the rear for the installation of the front and rear propellers 10, 20 and the reverse rotation device 30. Means. After the tail 3 is manufactured by casting, it is fixed to the hull 1 by welding. Moreover, the installation space 4 penetrated forward and backward so that the gear box 40 of the reversal rotation apparatus 30 mentioned later may be accommodated is provided. The inner surface of the installation space 4 can be processed into a cylindrical shape by boring so as to correspond to the outer shape of the gear box 40.

  As shown in FIGS. 2 and 3, the reversing rotation device 30 is installed in the gear box 40 in a state of penetrating the gear box 40 accommodated in the installation space of the rear tail 3 of the hull 1 and approximately the central portion of the gear box 40. And a rotating shaft 5 that is rotatably supported.

  As shown in FIGS. 2 to 4, the reverse rotation device 30 includes a drive bevel gear 31 installed in the gear box 40 so as to rotate together with the rotation shaft, and the gear box 40 in a form facing the drive bevel gear 31. A driven bevel gear 32 that is rotatably supported by the internal rotation shaft 5 and a plurality of reversing bevel gears 33 that reversely transmit the rotation of the drive bevel gear 31 to the driven bevel gear 32 are provided. In addition, a cylindrical first connecting member 35 that connects the rotating shaft 5 and the drive bevel gear 31, and a cylindrical second connecting member 36 that connects the driven bevel gear 32 and the hub 11 of the front propeller 10 can be included. .

  The rotating shaft 5 has a tip protruding forward of the gear box 40 and is coupled to the main drive shaft 6 inside the hull 1 so as to be separable and connectable. Further, as shown in FIG. 1, the main drive shaft 6 is connected to a drive source 8 (diesel engine, motor, turbine, etc.) installed inside the hull 1 so that the rotary shaft 5 is connected to the main drive shaft. 6 can be rotated together.

  The rear propeller 20 is fixed to the rotating shaft 5 extending rearward of the gear box 40, and the front propeller 10 is rotatably supported on the outer surface between the rear propeller 20 and the gear box 40. Although the front propeller 10 will be described in detail later, the front propeller 10 can be rotated in the direction opposite to the rear propeller 20 when the rotary shaft 5 rotates by being connected to the reversing rotation device 30.

  The main driving shaft 6 and the rotating shaft 5 may be connected to each other by a cylindrical coupling device 7 so as to be separated and coupled by a spline shaft coupling method. Here, although a spline shaft coupling is presented as an example, the connection method of the main drive shaft 6 and the rotary shaft 5 is not limited to this. A flange coupling method, a friction clutch method, a magnetic clutch method, or the like can be selectively employed.

  As shown in FIGS. 2 and 3, the rear propeller 20 is fixed to the rear portion of the rotating shaft 5 so as to rotate together with the rotating shaft 5. The rear propeller 20 includes a hub 21 fixed to the rotary shaft 5 and a plurality of blades 22 provided on the outer surface of the hub 21. The hub 21 of the rear propeller 20 is fixed in such a manner that the shaft coupling hole 23 at the center is press-fitted into the outer surface of the rotating shaft 5. The rear propeller 20 is firmly fixed to the rotating shaft 5 by fastening the fixing cap 24 to the rear end portion of the rotating shaft 5.

  For such coupling, the rear portion 5a of the rotating shaft 5 can be formed with a tapered outer surface whose outer diameter is reduced toward the rear, and the shaft coupling hole 23 of the hub 21 is formed on the rotating shaft. 5 can be configured with a tapered inner surface corresponding to the outer surface. In FIG. 2, reference numeral 25 denotes a propeller cap that is attached to the hub 21 so as to cover the rear surface of the hub 21 of the rear propeller 20 and the fixing cap 24.

  The front propeller 10 is rotatably installed on the outer surface of the rotating shaft 5 between the rear propeller 20 and the reverse rotation device 30. The front propeller 10 includes a hub 11 that is rotatably supported on the outer surface of the rotating shaft 5, and a plurality of blades 12 provided on the outer surface of the hub 11. Such a front propeller 10 can be installed on the outer surface of the rotating shaft 5 before the rear propeller 20 is installed. Further, since the blade rotates opposite to the rear propeller 20, the blade angle is opposite to the blade angle of the rear propeller 20.

  As shown in FIGS. 2 to 5, the hub 11 of the front propeller 10 is rotatably supported on the outer surface of the rotating shaft 5 by the first thrust bearing 13, the second thrust bearing 14, and the first radial bearing 15. The The first thrust bearing 13 and the second thrust bearing 14 are installed between the front inner surface of the hub 11 and the outer surface of the rotating shaft 5, and the first radial bearing 15 is the rear inner surface of the hub 11 and the rotating shaft. 5 can be installed between the outer surface and the outer surface.

  The first radial bearing 15 supports the radial load of the front propeller 10 acting in the radial direction of the rotary shaft 5, and the first and second thrust bearings 13 and 14 are thrust acting on the rotary shaft 5 in the front-rear axial direction, respectively. It can support the load. Specifically, the second thrust bearing 14 supports a thrust load that acts on the bow side from the front propeller 10 when the ship advances, and the first thrust bearing 13 acts on the stern side from the front propeller 10 when the ship moves backward. The thrust load to be supported can be supported.

  As shown in FIG. 5, the inner ring of the first thrust bearing 13 and the inner ring of the second thrust bearing 14 are arranged so as to be in contact with each other while being press-fitted into the outer surface of the rotating shaft 5, so that they are not pushed in the axial direction. Can be supported. The outer ring of the first thrust bearing 13 can be supported so as not to be pushed in the axial direction by being supported by the fixing ring 39 attached to the second connecting member 36 coupled to the hub 11.

  A cylindrical first support ring 17a and a second support ring 17b are respectively installed between the hub 11 of the front propeller 10 and the rotary shaft 5, so that the second thrust bearing 14 is not pushed in the axial direction. The first support ring 17a is interposed between the outer ring of the second thrust bearing 14 and the outer ring of the first radial bearing 15 so that they are mutually supported, and the second support ring 17b is supported by the second thrust bearing 14. The inner ring is interposed between the inner ring and the inner ring of the first radial bearing 15 so that they are mutually supported. In addition, an interval adjusting ring 18 is provided on the inner surface of the hub 11 between the outer ring of the first radial bearing 15 and a first sealing cover 71 described later, so that the outer ring of the first radial bearing 15 is axially moved. Avoid being pushed. Here, in order to support the outer ring of the first radial bearing 15 more stably, the case where the interval adjusting ring 18 is installed is shown. However, the outer ring of the first radial bearing 15 is press-fitted into the inner surface of the hub 11. In this case, since the outer ring of the first radial bearing 15 can be fixed without installing the interval adjusting ring 18, the interval adjusting ring 18 can be selectively employed depending on the design.

  As shown in FIG. 5, the inner ring of the first radial bearing 15 is fixed so as not to be pushed in the axial direction by mounting a cylindrical wedge member 16 between the outer ring and the outer surface of the rotary shaft 5. The wedge member 16 includes a tapered outer surface whose outer diameter decreases toward the rear and a thread formed on the outer surface on the rear side, and the inner surface is press-fitted and fixed to the outer surface of the rotary shaft 5. Further, the inner ring of the first radial bearing 15 can be constrained to the wedge member 16 by fastening the tightening nut 16a to the screw thread on the rear side. Therefore, the first radial bearing 15 can be firmly fixed between the outer surface of the rotating shaft 5 and the inner surface of the hub 11. A fixing clip 16b that prevents the wedge member 16 and the tightening nut 16a from being unwound can be fastened.

  When installing the front propeller 10, first, the first thrust bearing 13, the second thrust bearing 14, the first and second support rings 17 a and 17 b, and the wedge member 16 are sequentially installed on the outer surface of the rotating shaft 5. Next, as shown in FIG. 6, the hub 11 of the front propeller 10 is coupled to the outside of the rotating shaft 5, and the inner surface of the hub 11 is coupled to the outer rings of the first and second thrust bearings 13 and 14. In succession, after the first radial bearing 15 is pushed in between the outer surface of the wedge member 16 and the inner surface of the hub 11, a tightening nut 16a is fastened to the wedge member 16 to fix the inner ring of the first radial bearing 15. To do. After the first radial bearing 15 is installed, the interval adjusting ring 18 can be installed and the first sealing cover 71 can be attached.

  When the first radial bearing 15 is fixed using the wedge member 16 in this manner, manufacturing errors occur in parts such as the first and second support rings 17a and 17b, and the installation position of the first radial bearing 15 changes. In addition, the coupling error can be corrected by adjusting the mounting positions of the wedge member 16 and the first radial bearing 15. That is, the first radial bearing 15 can be fixed in a state where the wedge member 16 and the first radial bearing 15 are in close contact with the first and second support rings 17a and 17b, thereby minimizing the coupling error between components. can do. The distance adjusting ring 18 is installed after measuring the distance between the outer ring of the first radial bearing 15 and the first sealing cover 71 in a state where the first radial bearing 15 is mounted, and manufacturing the code so as to correspond thereto. be able to.

  When the front propeller 10 is separated from the rotary shaft 5 for repair after failure, the first sealing cover 71 and the distance adjusting ring 18 are separated in reverse order, and the tightening nut 16a fastened to the wedge member 16 is removed. After unraveling and separating the first radial bearing 15, the front propeller 10 can be pulled backward to separate it. After the front propeller 10 is separated, the first and second thrust bearings 13 and 14, the wedge member 16, and the first and second support rings 17 a and 17 b are exposed, so that they are also easily separated from the rotating shaft 5. be able to.

As shown in FIGS. 2, 4, and 7, the gear box 40 of the reversing rotating device 30 accommodates the driving bevel gear 31, the driven bevel gear 32, and the plurality of reversing bevel gears 33 therein, and is a cylinder whose both ends are open. A base portion 41, a front cover 42 coupled to the base portion 41 so as to close the front side opening of the base portion 41, and a base portion 41 so as to close the rear side opening of the base portion 41. A rear cover 43.

  The front cover 42 can rotatably support the first connecting member 35 penetrating the center portion thereof, and the rear cover 43 can also rotatably support the second connecting member 36 penetrating the center portion thereof. . For this purpose, a front bearing 44 is provided between the outer surface of the first connecting member 35 and the front cover 42, and a rear outer bearing 45 is provided between the outer surface of the second connecting member 36 and the rear cover 43. Installed.

  A plurality of the rear outer bearings 45 are continuously installed in the longitudinal direction of the rotary shaft 5 so that the second connecting member 36 is stably rotated. Between the inner surface of the second connecting member 36 and the rotary shaft 5, a rear inner bearing 46 is installed for rotatably supporting the second connecting member 36, and the first connecting member 35 and the outer surface of the rotary shaft 5 are arranged. Between them, a cylindrical sleeve bearing 47 is installed. A cylindrical separation ring 49 is provided on the outer surface of the rotating shaft 5 between the inner ring of the rear inner bearing 46 and the sleeve bearing 47 to support the space between them.

  The front bearing 44, the rear outer bearing 45, and the rear inner bearing 46 can all be configured by radial bearings. Such bearings 44, 45, 46 can realize a stable rotation while supporting a radial load acting on the rotating shaft 5, the first connecting member 35, and the second connecting member 36.

  The drive bevel gear 31 is coupled to the first coupling member 35 by fastening a plurality of fixing bolts 31 a so as to rotate together with the first coupling member 35. The driven bevel gear 32 is also connected to the second connecting member 36 by fastening a plurality of fixing bolts 32a. The driven bevel gear 32 can be separated from the rotary shaft 5 at its inner diameter portion so as not to interfere with the rotary shaft 5 during rotation.

  The plurality of reversing bevel gears 33 are interposed between the driving bevel gear 31 and the driven bevel gear 32 in a meshed state. The shafts 34 that support the reversing bevel gears 33 are arranged in a direction intersecting with the rotation shaft 5 (radial direction of the rotation shaft), and a plurality thereof are arranged radially about the rotation shaft 5. Further, bearings 34 a and 34 b are installed at both ends of the shaft 34 of each reversing bevel gear 33 for smooth rotation of the shaft 34.

  An internal frame 50 can be installed inside the gear box 40 in order to install the reversing bevel gear 33, and the internal frame 50 fastens a plurality of fixing members 51 in a state of entering the gear box 40. Can be fixed in the base portion 41.

  As shown in FIG. 4, the inner frame 50 is formed with a through hole 52 through which the rotary shaft 5 passes in the center, and the width W (the longitudinal width of the rotary shaft) is larger than the maximum outer diameter of the reversing bevel gear 33. It is provided in the form of a small cylinder or polygonal column. Such an inner frame 50 includes a plurality of gear installation portions 53 that rotatably accommodate each reversing bevel gear 33 and that are open on both sides so that the reversing bevel gear 33 meshes with the driving and driven bevel gears 31 and 32. Further, a first shaft support portion 54 and a second shaft support portion 55 are provided so as to support bearings 34 a and 34 b installed at both ends of the shaft 34 of the reversing bevel gear 33. In such a configuration, a plurality of reversing bevel gears 33 are arranged radially with the through hole 52 as the center so that a plurality of reversing bevel gears 33 can be installed.

  As shown in FIG. 4, the first shaft support portion 54 and the second shaft support portion 55 are provided in a form that is opened in one side surface direction of the inner frame 50 for mounting the shaft 34 of the inverted bevel gear. Further, a first fastening member 54a and a second fastening member 55a for covering and fixing the bearings 34a and 34b are mounted here. Therefore, when each reversing bevel gear 33 is installed on the inner frame 50, the reversing bevel gear 33, the shaft 34 of the reversing bevel gear, and the bearings 34a and 34b are assembled. After being installed in a manner to enter 53, the first and second fastening members 54a and 55a can be fastened and fixed. Here, one example for the method of mounting the reversing bevel gear 33 on the internal frame 50 has been presented, but the mounting method of the reversing bevel gear 33 is not limited to this. When the form of the internal frame 50 is changed, the method of mounting the reverse bevel gear 33 on the internal frame 50 can also be changed.

  The inner frame 50 to which the reversing bevel gear 33 is attached is placed in the base portion 41 of the gear box 40 before the driving bevel gear 31, the driven bevel gear 32, the front cover 42, and the rear cover 43 are installed in the process of assembling the reversing rotation device 30. After entering, the plurality of fixing members 51 can be fastened and fixed in the base portion 41.

  As shown in FIGS. 4 and 7, the plurality of fixing members 51 can be provided in the form of a cylindrical pin. Such a fixing member 51 is installed so as to penetrate the base portion 41 from the outside of the base portion 41 and enter the base portion 41, so that the inner end portion thereof supports the inner frame 50 in a fixed state. be able to. The inner end portion of the fixing member 51 can bind the inner frame 50 by entering the fixing groove 56 around the inner frame 50. The outer end portion of the fixing member 51 can be fixed to the base portion 41 by fastening a fixing screw.

  According to such a gear box 40, the drive bevel gear 31 and the driven bevel gear 32 can be installed through the openings on both sides of the base portion 41 after the reverse bevel gear assembly including the internal frame 50 is mounted in the base portion 41. In succession, components such as the front cover 42, the rear cover 43, the first connecting member 35, and the second connecting member 36 can be installed. Therefore, the reverse rotation device 30 can be easily assembled, and subsequent failure repair can be easily performed.

  The reversing rotation device 30 according to the embodiment of the present invention presents a case where there are a plurality of reversing bevel gears 33, but the reversing bevel gear 33 can transmit the rotation of the driving bevel gear 31 by reversing it to the driven bevel gear 32. It is not always necessary to have more than one if possible. A small vessel with a small driving load can realize its function with only one reversing bevel gear.

  Further, as shown in FIGS. 2 and 7, the reverse rotation device 30 includes a power connection device 60 that connects the rotation shaft 5 and the first connection member 35 in a separable manner. The power coupling device 60 includes a driving flange 61 provided on the rotary shaft 5 in front of the gear box 40, a driven flange 62 provided on the first connecting member 35 so as to face the driving flange 61, and the driving flange 61 and the driven flange. A friction member 63 interposed between the flange 62 and a plurality of connecting bolts 64 fastened in a form penetrating them are included. The drive flange 61 can be fixed to the rotary shaft 5 by welding or the like after being provided integrally with the rotary shaft 5 or manufactured separately. The driven flange 62 can be provided integrally with the first connecting member 35. The friction member 63 may have a form in which a plurality of friction members 63 are divided into semicircular shapes so that the friction members 63 can be separated to the outside in the radial direction after the connection bolts 64 are removed.

  The power coupling device 60 can break the power coupling between the drive flange 61 and the driven flange 62 by releasing the plurality of coupling bolts 64 and separating the friction member 63 when necessary. For example, when a failure of the reverse rotation device 30 occurs during the operation of the ship, power transmission from the rotary shaft 5 to the first connecting member 35 side can be interrupted. In this case, the ship can be operated only by the operation of the rear propeller 20.

  The second connecting member 36 includes a connecting flange 37 connected to the hub 11 of the front propeller 10 at the rear stage. The connection flange 37 can be provided integrally with the second connection member 36, and can be fixed to the front surface of the hub 11 of the front propeller 10 by fastening a plurality of fixing bolts 37a. Therefore, the rotation of the driven bevel gear 32 can be transmitted to the front propeller 10 by the second connecting member 36.

  Between the second connecting member 36 and the outer surface of the rotary shaft 5, a cylindrical third support ring 38 a and a fourth support ring 38 b that support the rear inner bearing 46 are installed. The third support ring 38a can be interposed between the inner ring of the rear inner bearing 46 and the inner ring of the first thrust bearing 13 to maintain a distance therebetween. The fourth support ring 38 b is installed on the inner surface side of the second connecting member 36 so as to support the outer ring of the rear inner bearing 46. A fixing ring 39 is attached to the rear end of the second connecting member 36 to prevent the fourth support ring 38b from being detached. As shown in FIGS. 2 and 5, the fixing ring 39 can support the outer ring of the first thrust bearing 13.

  In such a reverse rotation device 30, the first connecting member 35 rotates when the rotating shaft 5 rotates, and the drive bevel gear 31 connected to the first connecting member 35 rotates. The rotation of the driving bevel gear 31 is transmitted to the driven bevel gear 32 after being reversed by the plurality of reversing bevel gears 33, so that the driven bevel gear 32 rotates opposite to the driving bevel gear 31. The rotation of the driven bevel gear 32 is transmitted to the front propeller 10 by the second connecting member 36. Accordingly, it is possible to implement the opposite rotation of the front propeller 10 and the rear propeller 20.

  As described above, the reversing and rotating device 30 according to the embodiment of the present invention realizes the reciprocal reversal of the two propellers 10 and 20 through the plurality of bevel gears 31, 32 and 33, thereby comparing with the conventional planetary gear reversing and rotating device. The volume can be reduced. Therefore, the volume of the gear box 40 installed in the rear tail 3 of the hull can be minimized.

  Since the ordinary planetary gear type reversal rotating device includes a sun gear installed on the rotating shaft, a planetary gear installed outside the sun gear, and a cylindrical inscribed gear installed outside the planetary gear. The volume is relatively large. Further, in the planetary gear type reversal rotating device, since the inscribed gear arranged in the outermost shell has to rotate, the volume becomes very large considering the outer casing. Therefore, it is practically very difficult to install this at the tail of the hull as in the case of the embodiment of the present invention. For example, even if it is installed at the tail of the hull, there arises a problem that the size of the tail of the hull must be increased.

Further, as shown in FIG. 2, the propulsion device according to the embodiment of the present invention seals between the rear tail 3 of the hull and the hub 11 of the front propeller 10 to prevent intrusion of seawater (or fresh water) and foreign matter. The first sealing device 90 and the hub 11 of the front propeller 10 and the hub 21 of the rear propeller 20 for the same purpose.
And a second sealing device 110 for sealing between the two.

  As shown in FIG. 9, the first sealing device 90 includes a cylindrical first lining 91 installed on a connection flange 37 of the second connection member 36 fixed to the front surface of the front propeller hub 11, and a first lining. And a cylindrical first sealing member 92 that covers the outer surface of the first lining 91 so as to be in contact with the outer surface of the 91 and has one end fixed to the rear cover 43.

  The first sealing member 92 is spaced apart from the inner surface facing the first lining 91 and is in contact with the outer surface of the first lining 91, and between the packings 93a, 93b, 93c. And a flow path 95 for supplying a fluid for sealing to the groove. The flow path 95 of the first sealing member 92 is connected to a lubricating oil supply oil path 96 that passes through the front and rear covers 42 and 43 of the gear box 40 so that lubricating oil having a predetermined pressure is supplied. (See FIG. 2). Lubricating oil with pressure is supplied to the grooves between the respective packings 93a, 93b, 93c, and the packings 93a, 93b, 93c are pressed against the first lining 91 to prevent intrusion of seawater and foreign matter. can do.

  As shown in FIG. 10, the first lining 91 can be composed of a first member 91a and a second member 91b that are divided into semicircular shapes on both sides. In addition, a packing 91d is interposed in the mutually divided portion 91c of the first and second members 91a and 91b so as to be sealed when they are mutually coupled. Further, a first bundling portion 91e that protrudes from one side to the opposite side is provided on the divided free end side of the first member 91a, and the second member 91b on the opposite side is correspondingly coupled. A second bundling portion 91f is provided. Here, the fixing bolt 91g is fastened, whereby both sides are firmly connected to each other. A large number of fixing bolts 91 i are fastened to the flange portion 91 h fixed to the connecting flange 37, thereby being firmly fixed to the hub 11. Here, the case where the first lining 91 is divided into both sides for easy installation of the first lining 91 is illustrated, but the first lining 91 is not limited to this, and the first member 91a and the second lining 91 are separated from each other. A cylindrical shape in which the members 91b are integrally connected may be used.

  Also in the case of the first sealing member 92, a method may be employed in which a large number of rings 92a, 92b, 92c manufactured in a semicircular shape are stacked and fixed in the length direction of the rotary shaft 5 outside the first lining 91. . A large number of rings 92a, 92b, and 92c are bound together by bolt fastening or welding.

  As shown in FIG. 11, the second sealing device 110 includes a cylindrical second lining 111 installed on the front surface of the hub 21 of the rear propeller, and the second lining 111 so as to be in contact with the outer surface of the second lining 111. A cylindrical second sealing member 112 that covers the outer surface and has one end fixed to the rear surface of the front propeller hub 11. Similarly to the first sealing member 92, the second sealing member 112 includes a plurality of packings 113a, 113b, 113c installed on the inner surface, and a flow path 115 for supplying a fluid to a groove between these packings.

  The flow path 115 of the second sealing member 112 is communicated with a lubricating oil supply oil path 120 provided at the center of the rotating shaft 5. For this purpose, a first connecting oil passage 121 in the radial direction for connecting the lubricating oil supply oil passage 120 and the inner space 122 of the second lining 111 is formed in the rotating shaft 5, and the second propeller hub 11 has a second connecting oil passage 121. A second connection oil passage 123 is formed to communicate the inner space 122 of the lining 111 with the flow passage 115 of the second sealing member 112. Accordingly, the lubricating oil supplied from the central portion of the rotating shaft 5 to the second sealing member 112 side can pressurize the packings 113a, 113b, 113c, and the sealing can be realized through this.

  Similarly to the first lining 91 and the first sealing member 92 of the first sealing device 90, the second lining 111 and the second sealing member 112 are each formed in a semicircular shape, and are coupled after the rear propeller 20 is installed. It may be.

  As shown in FIGS. 2 and 5, the front propeller 10 is a ring-shaped first mounted on the rear surface side of the hub 11 in order to seal the space between the outer surface of the rotating shaft 5 and the inner surface of the hub 11. 1 sealing cover 71 is included. The first sealing cover 71 includes a sealing member 71 a that enhances adhesion on the inner peripheral surface that is in contact with the outer surface of the rotating shaft 5. Such a first sealing cover 71 can prevent the seawater from flowing into the gear box 40 side even if seawater enters the inner space 122 of the second lining 111 due to a failure of the second sealing device 110. it can. That is, when the first sealing cover 71 implements the secondary barrier, seawater intrusion to the gear box 40 side can be more clearly prevented.

  Referring to FIG. 2, the driven flange 62 in front of the gear box 40 has a second shape similar to the first sealing cover 71 described above for sealing between the driven flange 62 and the outer surface of the rotating shaft 5. A sealing cover 72 is installed. The second sealing cover 72 can prevent the lubricating oil filled in the gear box 40 from leaking to the hull 1 side.

The reverse rotation device 30 includes a front sealing cover 73 that covers the front surface of the front bearing 44 between the front cover 42 and the first connecting member 35 in a sealable manner, a rear cover 43, and the second connecting member 36.
And a rear sealing cover 74 that covers the rear surface of the rear outer bearing 45 therebetween. The front and rear sealing covers 73 and 74 can also be provided in a form similar to the first sealing cover 71 described above.

  The front sealing cover 73 and the rear sealing cover 74 can prevent the lubricating oil inside the gear box 40 from leaking to the outside of the gear box 40. Further, as with the first sealing cover 71, the rear sealing cover 74 allows the seawater to flow into the gear box 40 even if seawater enters the inner space of the first lining 91 due to a failure of the first sealing device 90. It can function as a secondary barrier that prevents

  Further, the propulsion device according to the embodiment of the present invention may include a second radial bearing 81 that supports the rotating shaft 5 in front of the gear box 40, a third thrust bearing 82, and a fourth thrust bearing 83. it can. The second radial bearing 81 can be fixed to the first bearing support portion 86 inside the hull 1 while being accommodated in the first bearing case 84. The third and fourth thrust bearings 82 and 83 can also be fixed to the second bearing support portion 87 inside the hull 1 in a state in which the inner rings are accommodated in the second bearing case 85 in such a manner that the inner rings are mutually supported.

  The second radial bearing 81 supports the rotating shaft 5 in front of the gear box 40 and prevents vibration and shaking of the rotating shaft 5 in the radial direction. The third and fourth thrust bearings 82 and 83 function to transmit the axial force transmitted from the front and rear propellers 10 and 20 to the rotating shaft 5 to the hull 1 side. In particular, the third thrust bearing 82 functions to transmit the force acting in the bow direction from the rotary shaft 5 to the hull 1 when the ship moves forward, and the fourth thrust bearing 83 serves from the rotary shaft 5 to the stern direction when the boat moves backward. The function which transmits the force which acts on hull 1 to the hull 1 is carried out.

  In FIG. 2, reference numeral 131 is a first cover ring that covers the space between the rear tail 3 of the hull outside the first sealing device 90 and the hub 11 of the front propeller, and reference numeral 132 is the outer side of the second sealing device 110. It is the 2nd cover ring which covers between the hub 11 of a front propeller, and the hub 21 of a back propeller. The first cover ring 131 is fixed to the rear tail 3 of the hull and installed in a manner slightly separated from the hub 11 of the front propeller, or is attached to the hub 11 of the front propeller 10 in a state of being somewhat separated from the rear tail 3 of the hull. It is fixed and can rotate with the forward propeller 10. The second cover ring 132 can also rotate together with the fixed side while being fixed to one of the hub 11 of the front propeller and the hub 21 of the rear propeller.

  Next, a method for manufacturing a propulsion device according to an embodiment of the present invention and installing it on a hull will be described.

  As shown in FIG. 7, when installing the propulsion device, the gear box 40 and related parts constituting the reversing rotation device 30 and the rotating shaft 5 are assembled before being mounted on the hull 1. That is, the inner frame 50 in which the base body 41 and the reversing bevel gear 33 are assembled outside the rotating shaft 5, the driving bevel gear 31, the driven bevel gear 32, the first connecting member 35, the front cover 42, the front bearing 44, and the second connecting member 36. The rear cover 43, the rear outer bearing 45, etc. are assembled. The first lining 91 and the first sealing member 92 of the first sealing device 90 are also installed between the connecting flange 37 of the second connecting member 36 and the rear cover 43.

  Since such a reversal rotation device 30 can be assembled after each part is processed in a separate manufacturing factory, it can be precisely manufactured. Moreover, since the 1st sealing device 90 which should be installed after installation of the front propeller 10 can be normally mounted | worn with the inversion rotation apparatus 30 normally, the operation | work which installs a propulsion apparatus in the hull 1 after the simplification is simplified. can do.

  The rotating shaft 5 and the reversing rotating device 30 assembled at the manufacturing factory can be mounted on the rear tail 3 of the hull 1 after being transferred to a dock or the like for manufacturing the hull 1 using the transport means. At this time, a lifting device such as a crane that can lift the assembly of the reversal rotating device 30 can be used. When the reverse rotation device 30 is mounted, first, the gear box 40 of the reverse rotation device 30 is caused to enter the installation space 4 of the rear tail 3 of the hull 1 from the rear side of the hull 1 by a sliding method. Then, they are aligned so that the center of the rotary shaft 5 and the center of the main drive shaft 6 coincide.

  After the reversing and rotating device 30 enters the installation space 4 of the rear tail 3 of the hull and is aligned, as shown in FIG. 8, the front fixing member 48a and the rear fixing member 48b are installed in front and rear of the gear box 40, respectively. Then, the gear box 40 is fixed to the rear tail 3 of the hull. The front and rear fixing members 48a and 48b may be divided into a large number. The front and rear fixing members 48a and 48b can be fixed to the structure of the gear box 40 and the rear tail 3 of the hull by fastening a number of fixing bolts.

  The rear fixing member 48b can be attached by an operator approaching from the rear of the hull 1, and the front fixing member 48a can be installed by the operator approaching from the inside of the hull 1. In this way, the reversing rotation device 30 that is mounted in such a manner as to enter the installation space 4 of the rear tail 3 of the hull can separate the reversing rotation device 30 from the hull 1 when a failure or the like occurs later. Trouble repair is possible. Therefore, failure repair can be performed easily.

  In the embodiment of the present invention, the case in which the front fixing member 48a and the rear fixing member 48b are fastened to the front and rear of the gear box 40 to firmly fix the gear box 40 is illustrated. However, the gear box 40 is installed in the installation space 4. Since the outer surface of the gear box 40 is supported by the inner surface of the installation space 4 when the vehicle is advanced to, the gear box 40 can be fixed to the hull tail 3 even if only the rear fixing member 48b is fastened. .

  After the gear box 40 is fixed to the rear tail 3 of the hull, the main drive shaft 6 and the rotary shaft 5 are connected by the coupling device 7, and the second radial bearing 81, the third and fourth thrust bearings are connected inside the hull 1. 82 and 83 are installed so that the rotating shaft 5 is supported by the hull 1.

  After the reverse rotation device 30 is mounted on the rear tail 3 of the hull, as shown in FIGS. 1 and 2, the front propeller 10, the rear propeller 20 and related parts are mounted on the rotation shaft 5, and the second sealing device 110. Installation of the propulsion device can be finished by attaching

  Next, the operation of the propulsion device according to the embodiment of the present invention will be described.

  In the propulsion device, when the rotating shaft 5 rotates by the operation of the internal drive source 8 of the hull 1, the rear propeller 20 directly connected to the rear end portion of the rotating shaft 5 rotates together in the same direction as the rotating shaft 5. At the same time, the drive bevel gear 31 of the reversing rotating device 30 is also fixed to the rotating shaft 5 and thus rotates together with the rotating shaft 5. The rotation of the drive bevel gear 31 is reversed by the plurality of reversing bevel gears 33 and transmitted to the driven bevel gear 32, so that the driven bevel gear 32 rotates opposite to the rotating shaft 5. Accordingly, the front propeller 10 connected by the driven bevel gear 32 and the second connecting member 36 rotates in the opposite direction to the rear propeller 20.

  The front propeller 10 and the rear propeller 20 that rotate opposite to each other generate the propulsion water flow in the same direction because the blade angles are opposite to each other. That is, when the vessel moves forward, a propulsion water flow is generated backward, and when the vessel moves backward, the propulsion water flow is generated forward while rotating in reverse. Further, the propulsion water flow generated at the time of forward movement collects the rotational energy of the fluid that has passed through the front propeller 10 as the propulsive force while the rear propeller 20 rotates in the reverse direction, so that the propulsion performance is improved. The same applies to reverse travel.

  On the other hand, the forward propeller 10 generates a propulsion water flow rearward when moving forward, and thus receives a reaction force corresponding to this. This force is transmitted to the rotary shaft 5 through the second thrust bearing 14 and acts as a propulsive force. The rear propeller 20 also generates a propulsion water flow when moving forward, so that it receives a reaction force. This force is also transmitted to the directly connected rotary shaft 5 and acts as a propulsion force.

  When the marine vessel moves backward, the propulsive force of the front propeller 10 is transmitted to the rotating shaft 5 through the first thrust bearing 13, and the propulsive force of the rear propeller 20 is also transmitted to the directly connected rotating shaft 5.

  After all, in the propulsion device according to the embodiment of the present invention, the propulsive force generated by the operations of the front propeller 10 and the rear propeller 20 is transmitted to the rotating shaft 5 when the ship moves forward and backward. Further, since the propulsive force transmitted to the rotating shaft 5 is transmitted to the hull 1 through the third and fourth thrust bearings 82 and 83, the hull 1 is propelled.

  On the other hand, a power generator including the coil 203 and the magnetic body 205 can be installed in the propulsion device described above to produce electrical energy. Here, the magnetic body 205 may include at least one of a permanent magnet and an electromagnet. Permanent magnets generate their own power, but in the case of electromagnets, a separate electric supply is required. When the magnetic body 205 is provided by an electromagnet, electricity can be supplied through an electricity supply line (not shown).

  Referring to FIG. 12, the coil 203 and the magnetic body 205 are installed so as to face each other between the hub 11 of the front propeller 10 and the rotating shaft 5. Electric energy can be produced by the rotated rotation.

  At this time, the coil 203 is wound and installed along the outer peripheral surface and the inner peripheral surface of the first inner support ring 17b, and the magnetic body 205 is placed inside the first outer support ring 17a so as to face the coil 203. Can be installed. Here, the first outer support ring 17a and the first inner support ring 17b are provided in a cylindrical shape between the hub 11 of the front propeller 10 and the rotary shaft 5 as described above. That is, the first outer support ring 17a is interposed between the outer ring of the second thrust bearing 14 and the outer ring of the first radial bearing 15 to mutually support them, and the first inner support ring 17b is the second thrust ring. They are interposed between the inner ring of the bearing 14 and the inner ring of the first radial bearing 15 to mutually support them.

  The coil 203 is installed by winding the second inner support ring 38 a along the outer peripheral surface and the inner peripheral surface, and the magnetic body 205 is disposed inside the second outer support ring 38 b so as to face the coil 203. Can be installed. Here, the second inner support ring 38a and the second outer support ring 38b are provided in a cylindrical shape between the second connecting member 36 and the outer surface of the rotary shaft 5 as described above, and support the rear inner bearing 46. . That is, the second inner support ring 38a is interposed between the inner ring of the rear inner bearing 46 and the inner ring of the first thrust bearing 13 to maintain a distance therebetween, and the second outer support ring 38b is It is installed on the inner surface side of the second connecting member 36 so as to support the outer ring of the bearing 46. The second connecting member 36 is rotatably supported on the outer side of the rotating shaft 5 and connects the driven bevel gear and the hub 11 of the front propeller 10. The rear inner bearing 46 is installed between the inner surface of the second connecting member 36 and the rotating shaft 5.

  The magnetic body 205 described above may be installed so as to be completely embedded in each of the outer support rings 17a and 38b, or may be installed in a form in which only a part is embedded and the remaining part protrudes. .

  Thus, the coil 203 and the magnetic body 205 installed so as to face each other are rotated in a mutually opposite manner when the rotating shaft 5 rotates, and the coil 203 cuts off the magnetic force emitted from the magnetic body 205, thereby Will occur. At this time, the productivity and efficiency of electrical energy can be improved by the mutually contradictory rotations. Moreover, the electrical energy produced by the power generation device can be used as an energy source for various facilities in the ship. For example, when a device for inspecting various facilities of the propulsion device or the like is mounted on the switchboard in the ship, the device can be supplied.

  Hereinafter, in order to help understanding of the embodiment of the present invention, the coil 203 wound along the outer peripheral surface and the inner peripheral surface of the first inner support ring 17b, and the magnetic body 205 is opposed to the coil 203 so as to face the coil 203. An example will be described in which electrical energy produced by the reciprocal rotation of the magnetic body 205 installed inside the support ring 17a is utilized. However, the present invention is not limited to this, and the coil 203 wound along the outer peripheral surface and the inner peripheral surface of the second inner support ring 38 a described in FIG. 12 and the second outer support ring 38 b so as to face the coil 203. Of course, the electric energy produced by the reciprocal rotation of the magnetic body 205 installed inside can also be utilized.

  Referring to FIGS. 12 and 13, the operating states of the bearings 13 to 15 and 81 to 83 interposed between the hub 11 of the front propeller 10 and the rotating shaft 5 and between the rotating shaft 5 and the hull 1 are monitored. In order to do so, the measuring unit 210 can be installed on the rotary shaft 5 adjacent to the bearings 13 to 15 and 81 to 83. Here, the measurement unit 210 can be provided in a number corresponding to each of the bearings 13 to 15 and 81 to 83.

  FIG. 13 shows the rotating shaft 5 adjacent to the bearings 13 to 15 in order to monitor the operating state of the bearings 13 to 15 interposed between the hub 11 of the front propeller 10 and the rotating shaft 5. It is the figure which expanded and showed only the form in which the measurement unit 210 was installed.

  12 to 14, the measurement unit 210 includes a sensor 211 that measures a temperature change of each of the bearings 13 to 15 and 81 to 83, and an adapter 212 that incorporates the sensor 211. At this time, the electric energy produced by the reciprocal rotation of the coil 203 and the magnetic body 205 can be supplied as an energy source of the sensor 211 through an electric supply line (not shown).

  Here, the adapter 212 may be formed in the form of a bell mouth and mounted in a form embedded in the groove 5 b of the rotating shaft 5 or may be provided integrally with the rotating shaft 5. At this time, the coupling groove 5 b can be formed to correspond to the outer shape of the adapter 212. By providing the adapter 212 including the sensor 211 on the rotating shaft 5 in the form of a bell mouth, it is possible to prevent stress concentration and effectively maintain the strength of the rotating shaft 5.

  Further, the adapter 212 is provided with a metal material and can transmit the thermal energy generated from the bearings 13 to 15 and 81 to 83 to the sensor 211. Such an adapter 212 can be provided with a metal material having higher thermal conductivity than the material of the rotating shaft 5. For example, the adapter 212 may be provided as one or more metal materials such as Al, Cr, Ti, Cu, and Au, or may be provided as a combination of two or more of these. As described above, the adapter 212 incorporating the sensor 211 is provided with a metal material having high thermal conductivity, so that each bearing through the sensor 211 can be used even if the sensor 211 does not contact the bearings 13 to 15 and 81 to 83 directly. The temperature change of 13-15 and 81-83 can be measured effectively.

  The temperature change measurement values of the bearings 13 to 15 and 81 to 83 measured by the sensor 211 are converted into electric signals and provided to a monitoring device 220 (see FIG. 15) described later. For this purpose, a connection cable 215 that is connected to the sensor 211 and transmits the temperature change measurement values of the bearings 13 to 15 and 81 to 83 to the outside is provided. Here, when there are a plurality of connection cables 215, a multi-channel slip ring (not shown) can be used so that the connection cables 215 are not entangled with each other. The connection cable 215 can be connected to a monitoring device 220 described later through the inner space of the rotation shaft 5. At this time, when data transmission is performed in a wireless manner, the connection cable 215 can be omitted.

  Referring to FIG. 15, the monitoring device 220 may operate one or more of the bearings 13 to 15 and 81 to 83 based on the temperature change measurement values of the bearings 13 to 15 and 81 to 83 received from the sensor 211. The condition can be monitored. For this purpose, the monitoring device 220 includes a communication unit 221, a determination unit 223, a display unit 225, and a storage unit 227.

  The communication unit 221 receives the temperature change measurement values of the bearings 13 to 15 and 81 to 83 measured by the sensor 211. Further, the communication unit 221 processes the received temperature change measurement value and transmits it to the determination unit 223 described later.

  The determination unit 223 compares the temperature change measurement values of the bearings 13 to 15 and 81 to 83 received from the communication unit 221 with a reference value, and the operations of the bearings 13 to 15 and 81 to 83 are performed based on the comparison result. It is determined whether or not the normal state is maintained. At this time, the determination unit 223 can individually determine whether normal operation is possible for each of the bearings 13 to 15 and 81 to 83.

  For example, when the temperature change measurement values (range) of the bearings 13 to 15 and 81 to 83 are included in the reference value (range), the determination unit 223 determines that the operations of the bearings 13 to 15 and 81 to 83 are normal. Judge that it is maintained. On the other hand, when the temperature change measurement values of the bearings 13 to 15 and 81 to 83 exceed the reference value, the determination unit 223 determines that the operations of the bearings 13 to 15 and 81 to 83 are performed in an abnormal state. to decide.

  Here, the fact that the operations of the bearings 13 to 15 and 81 to 83 are maintained in a normal state indicates that the bearings 13 to 15 and 81 to 83 are normally performing various functions. In addition, maintaining the abnormal state indicates that the bearings 13 to 15 and 81 to 83 are greatly damaged due to wear or the like and thus cannot perform various functions normally.

  Next, the display unit 225 displays one or more of the temperature change measurement values and comparison result information of the bearings 13 to 15 and 81 to 83 on the screen. Through this, it is possible to confirm whether or not the operations of the bearings 13 to 15 and 81 to 83 maintain a normal state in real time. Moreover, when damage generate | occur | produces in one or more in each bearing 13-15, 81-83, the countermeasure with respect to it can be performed rapidly.

  The storage unit 227 is a reference value (reference value) for the determination unit 223 described above to determine the operating state of the bearings 13 to 15 and 81 to 83 based on the temperature change measurement values of the bearings 13 to 15 and 81 to 83. Save range). In addition, the storage unit 227 receives the temperature change measurement values of the bearings 13 to 15 and 81 to 83 received from the communication unit 221 and various algorithms for processing the measured values, the structures of the bearings 13 to 15 and 81 to 83, and the like. Information can be saved. The storage unit 227 includes a cache, a ROM (Read Only Memory), a PROM (Programmable ROM), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically Erasable Programmable ROM), and a flash memory (Flash memory non-volatile memory). It can be implemented in at least one of a volatile memory device such as a RAM (Random Access Memory) or a storage medium such as an HDD (Hard Disk Drive) or a CD-ROM, but is not limited thereto. Absent.

  Each component shown in FIG. 15 can be constituted by a kind of “module”. Here, the “module” means a hardware component such as software, a field programmable gate array (FPGA), or an application specific integrated circuit (ASIC), and the module performs a predetermined role. However, the module is not limited to software or hardware. The module may be configured on a storage medium that can be addressed, or configured to execute one or more processors. The functionality provided by the components and modules can be combined into a smaller number of components and modules or further separated into additional components and modules.

  As described above, the embodiments of the present invention have been described with reference to the accompanying drawings. However, those who have ordinary knowledge in the technical field to which the present invention belongs may be used without departing from the technical idea of the present invention. Since various substitutions, modifications, and changes are possible, the present invention is not limited to the above-described embodiments and attached drawings.

Claims (15)

A rear propeller fixed to the rotating shaft;
A front propeller rotatably supported by the rotating shaft in front of the rear propeller;
One or more bearings interposed between the front propeller herb and the rotating shaft, and at least one of the rotating shaft and the hull;
A gear box accommodated in an installation space formed at the rear of the hull in a state in which a plurality of gears embodying the inversion of the front propeller are incorporated by reversing the rotation of the rotation shaft and transmitting it to the front propeller; Including a reversing rotation device including
The marine vessel propulsion apparatus, wherein the rotating shaft is equipped with one or more measurement units for monitoring one or more operating states in the bearing.   The marine propulsion device according to claim 1, wherein the measurement unit includes a sensor that measures a temperature change of the bearing, and an adapter that incorporates the sensor.   The adapter is made of a metal material having thermal conductivity, is formed in a bell mouth shape, and is attached to a coupling groove provided on the rotating shaft, or is provided integrally with the rotating shaft. The marine vessel propulsion device according to claim 2, wherein the marine vessel propulsion device is a marine vessel.   The marine vessel propulsion device according to claim 2, further comprising a connection cable connected to the sensor and transmitting a temperature change measurement value of the bearing to the outside. A communication unit for receiving a temperature change measurement value of the bearing from the sensor;
A determination unit for determining whether the operation of the bearing is maintained in a normal state based on the received temperature change measurement value of the bearing;
The marine vessel propulsion device according to claim 2, further comprising a display unit that displays one or more of the measured temperature change value of the bearing and the determined result value on a screen. The bearings include first and second thrust bearings that support a thrust load acting on the rotating shaft from the front propeller;
A first radial bearing that supports a radial load acting on the rotating shaft from the front propeller;
A second radial bearing installed between the rotating shaft and the hull, and supporting the rotating shaft in front of the gear box;
2. The apparatus according to claim 1, further comprising at least one of a third thrust bearing and a fourth thrust bearing that transmit an axial force transmitted from the front propeller and the rear propeller to the rotating shaft to the hull side. Marine propulsion device.   It includes a coil and a magnetic body that are installed between the hub of the front propeller and the rotating shaft so as to face each other, and produces electrical energy by the reciprocal rotation of the coil and the magnetic body when the rotating shaft rotates. The marine vessel propulsion device according to claim 6, further comprising a power generation device configured to supply the electrical energy as an energy source of the measurement unit.   The marine propulsion device according to claim 7, wherein the magnetic body includes one or more of a permanent magnet and an electromagnet. A cylindrical first outer support ring and a first inner support ring provided between the hub of the front propeller and the rotary shaft;
The first outer support ring is interposed between the outer ring of the second thrust bearing and the outer ring of the first radial bearing to mutually support them;
The marine propulsion device according to claim 7, wherein the first inner support ring is interposed between an inner ring of the second thrust bearing and an inner ring of the first radial bearing to mutually support them. . The plurality of gears are drive bevel gears coupled to the rotating shaft to rotate together;
A driven bevel gear supported rotatably around the rotation axis and coupled to a hub of the front propeller;
The marine vessel propulsion device according to claim 9, further comprising one or more reversing bevel gears that reverse rotation of the driving bevel gear and transmit the rotation to the driven bevel gear. A connecting member rotatably supported on the outer side of the rotating shaft and connecting the driven bevel gear and the hub of the front propeller;
The marine vessel propulsion device according to claim 10, further comprising a rear inner bearing installed between the inner surface of the connecting member and the rotating shaft. A cylindrical second inner support ring and a second outer support ring which are provided between the connecting member and the outer surface of the rotating shaft and support the rear inner bearing;
The second inner support ring is interposed between the inner ring of the rear inner bearing and the inner ring of the first thrust bearing to maintain a space therebetween.
The marine propulsion device according to claim 11, wherein the second outer support ring is installed on an inner surface side of the connecting member so as to support an outer ring of the rear inner bearing. The coil is wound along an outer peripheral surface and an inner peripheral surface of the first inner support ring,
The marine propulsion device according to claim 9, wherein the magnetic body is installed inside the first outer support ring so as to face the coil. The coil is wound along an outer peripheral surface and an inner peripheral surface of the second inner support ring,
The marine propulsion device according to claim 12, wherein the magnetic body is disposed inside the second outer support ring so as to face the coil.   A ship provided with the propulsion device according to any one of claims 1 to 4.

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